Ovulation testing

Justine • Momma of 3 💙 11/11/15•••💙 09/16/19•••🩷02/23/21

I’m newly ttc. My son wants a sibling in the worst way. He was not a planned pregnancy, but this one will be. I’m on my 2nd day of fertility. When should I take an ovulation test? And what do the results mean?